Pull Box Wire Theft Protection Using J-Bolt Anchoring
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Solution Overview
Problem
Existing pull boxes used for street and highway lighting are vulnerable to theft of copper wire due to inadequate security measures, as thieves have been able to breach current security enclosures, especially with rising copper prices.
Innovation Solution
A novel wire theft protection enclosure kit and method that upgrades existing pull boxes with keyed fastener nuts, a template tool, and a J-bolt anchor system to secure the pull box in the ground, making it difficult for unauthorized access and theft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing pull boxes are used with conventional security measures, then the structure is simple and easy to access, but the security against wire theft is insufficient
Solution Approach 1:
The patent implements a nested security structure where an inner security enclosure is placed within the outer pull box enclosure. The inner enclosure contains the wire connections and is secured with a security lid that nests into the outer box, creating multiple layers of protection against wire theft while maintaining a relatively simple overall structure.
Solution Approach 2:
The security system is divided into separate functional components: an outer pull box enclosure, an inner security enclosure, a security lid with locking mechanism, and a concrete base. This segmentation allows each component to perform its specific security function while enabling modular installation and maintenance.
2Ease of operation
If the pull box is made easily accessible for maintenance, then the ease of operation is high, but the vulnerability to unauthorized access and theft increases
Solution Approach 1:
The security lid acts as an intermediary component between the outer enclosure and inner enclosure. It provides controlled access to the wire connections through a secure locking mechanism that requires authorization, while still allowing maintenance personnel to access the connections when properly authenticated.
Solution Approach 2:
The locking mechanism is designed to be self-securing, where the security lid automatically locks into place when installed, providing continuous protection without requiring active monitoring or external security systems. The design itself enforces security through its mechanical locking features.
Data Source
AI summary
A kit and method for preventing theft of wires interconnected within a pull box includes a steel cover plate having a downwardly protruding cup which has a central perforation in its base that receives the upstanding shank of a J-bolt anchored in concrete poured into a bore made in the floor of a pit holding the pull box. A template plate inserted into the open upper end of the pullbox has a central hole which receives the shank of the J-bolt while the concrete is hardening to maintain the pull box centered on the J-bolt, removed after the concrete has hardened, and replaced by the cover plate which is secured in place by tightening an oval external cross-section security nut onto the upper surface of the cup base plate using a novel socket wrench.